I am new FCP I have shot some green screen footage and have used them before and everything worked great. I updated to 6.0.4 now all my masks have a black background any help would be great.
Dave, first describe the problem more clearly. Where is the black? Before this, you keyed out the green background from your shots so that they're transparent, right? So is the green background now opaque and black? Or is it something else?